Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
190059goodexcellent71excellent
180052goodexcellent81excellent
170045goodexcellent81excellent
160050goodexcellent81excellent
150043goodexcellent81excellent
140051goodexcellent81excellent
130051goodexcellent81excellent
120039goodexcellent71excellent
110039goodexcellent61excellent
100042goodexcellent71excellent
090049goodexcellent71excellent
080042goodexcellent81excellent
070043goodexcellent71excellent
060046goodexcellent71excellent
050038goodexcellent81excellent
040057goodexcellent101excellent
030059goodexcellent111excellent
020058goodexcellent101excellent
010048goodexcellent101excellent
000055goodexcellent81excellent
230041goodexcellent81excellent
220050goodexcellent91excellent
210060goodexcellent121excellent
200078lightly pollutedexcellent141excellent